Minimal Powertop as Bash Script esp. for Embedded Environments

I wrote this for my kindle and android devices. It's a nice, easy script though and should be great especially for embedded environments, where you have a shell but not all of the powertop dependencies. It works wonderfully on my notebook and netbook, but you may have to slightly adjust the path names to work on your system.

It turns out that this wasn't needed for either, as the kindle comes with powertop preinstalled. But it can't work on either of my devices, as timer_stats are disabled in their kernels.
I do wonder: Why do they disable the timer_stats? Is the overhead of timer_stats too high? Let me know how you use it!
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